| Locality | Post Code |
|---|---|
| Arijon, San Jerónimo | S2242 XAA |
| Arocena, San Jerónimo | S2242 |
| Barrancas, San Jerónimo | S2246 |
| Barrio Caima, San Jerónimo | S2245 |
| Bernardo de Irigoyen, San Jerónimo | S2248 |
| Campo Brarda, San Jerónimo | S2248 XAB |
| Campo Carignano, San Jerónimo | S2248 XAC |
| Campo Galloso, San Jerónimo | S2212 XAA |
| Campo Garcia, San Jerónimo | S2240 XAC |
| Campo Genero, San Jerónimo | S2248 XAD |
| Campo Gimenez, San Jerónimo | S2253 XAA |
| Campo Moure, San Jerónimo | S2240 XAD |
| Carcel Modelo Coronda, San Jerónimo | S2240 XAA |
| Casalegno, San Jerónimo | S2248 XAA |
| Centeno, San Jerónimo | S2148 |
| Colonia Corondina, San Jerónimo | S2240 XAB |
| Colonia Piaggio, San Jerónimo | S2252 XAA |
| Coronda, San Jerónimo | S2240 |
| Desvío Arijón, San Jerónimo | S2244 |
| Díaz, San Jerónimo | S2222 |
| Gaboto, San Jerónimo | S2208 |
| Gálvez, San Jerónimo | S2252 |
| Gessler, San Jerónimo | S2253 |
| Irigoyen, San Jerónimo | S2249 |
| Larrechea, San Jerónimo | S2241 |
| Loma Alta, San Jerónimo | S2254 |